"We're not expecting everything to go perfectly today, we're expecting there to be things that we need to learn from. There are also a number of people involved making sure that none of this impacts on the running of the hospital as well.

"What we're doing is testing our procedures before going into the emergency department. So if you go past those double doors today, there is nothing to see it's all to see out on the ramp.

"We're not doing this in response to any intelligence, this is us actively practicing our major incident procedures at the hospital. The one thing you can't do in a major incident is get the manual out, you need to just know what to do."